JPH07137039A - Method of forming temperature control flow path of mold and its structure - Google Patents

Abstract

(57) [Summary] [Purpose] To easily and easily form a temperature control channel near the surface of the mold body. [Structure] A groove 3 is formed on a surface 1a of a mold body 1, the groove 3 is closed by a lid 4 to form a temperature control channel 2, and then the mold body 1 is machined. The surface 1a was processed to integrate the lid 4 with the surface 1a of the mold body 1.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for forming a temperature control channel of a mold used for molding a resin molded product and the structure thereof.

[0002]

2. Description of the Related Art For example, in a mold used for molding a product having a large and complicated shape such as an instrument panel of an automobile, in order to make the temperature distribution on the surface of the mold uniform, A temperature control channel is provided in the main body.

As shown in FIG. 5, the temperature control flow path 30 has a lateral cooling water hole 21 formed inside the mold body 20, and the cooling water hole 21 from the back side of the mold body 20. A vertical cooling water hole 22 reaching near the surface of the mold body 20 is formed, and a lower end portion of the vertical cooling water hole 22 is closed by a lid 23.

Further, as shown in FIG. 6, the temperature control passage 30 has grooves 24 formed on the back surface side of the mold body 20, and these grooves 24 are closed by a dummy block 25 to form cooling water holes 26. Configured. Further, as shown in FIG. 7, a groove 24 is formed on the back surface side of the mold body 20, a dummy block 28 is screwed to the holding plate 27, and the dummy block 28 is inserted into a part of the groove 24. A structure in which the groove 24 is closed by the holding plate 27, and the cooling water hole 26 is formed by interposing the seal member 29 between the holding plate 27 and the lower surface of the mold body 20, As shown in FIG. 8, a groove 24 is formed on the back side of the mold body 20, and the back side of the mold body 20 is filled with a filler 31 such as concrete, resin, or ZAS to close the opening of the groove 24. Then, the cooling water hole 26 is formed.

[0005]

However, in the conventional mold temperature control flow channel structure, the one shown in FIG. 5 has a uniform temperature control effect, that is, a cooling effect, on the surface shape of the mold body 20. In addition, it is difficult to increase the cooling effect, and the poor cooling effect promotes resin coagulation at a high temperature portion, resulting in a long resin molding time and a high cost. In addition, since the temperature of each part of the surface of the mold body 20 is different, the shrinkage amount of the resin material is different, and the shape of the parts is changed, and the cooling water holes 21 are long holes. However, there is a problem that it takes a long processing time and the number of manufacturing steps increases.

Further, in the conventional mold temperature control flow channel structure shown in FIGS. 6 to 8, it is difficult to seal, the number of processing steps is large, and the resin molding force of the mold body 20 is large. There was a problem in that the strength of the mold was difficult if it was added to the surface.

The present invention has been made by paying attention to the above problems, and the first object thereof is to easily form a temperature control passage near the surface of the mold body. It is an object of the present invention to provide a method for forming a temperature control flow path of a mold that can be performed.

A second object of the present invention is to improve the temperature control effect (cooling effect), shorten the resin molding time, reduce the cost, and improve the quality of the resin product. It is to provide a mold temperature control flow channel structure that contributes to the mold structure.

[0009]

In order to achieve the above-mentioned first object, the method for forming a temperature control flow path of a mold of the present invention comprises forming a groove on the surface of the mold body, It is closed with a lid to form a temperature control channel, and then the surface of the mold body is machined to integrate the lid with the surface of the mold body. And

In order to achieve the above-mentioned second object, in the mold temperature control flow channel structure of the present invention, a groove is formed on the surface of the mold body, and the groove is closed by a lid. It is characterized in that a temperature control channel is formed.

In order to achieve the above-mentioned second object, the mold temperature control flow channel structure of the present invention has a stepped groove portion formed on the surface of the mold body, and a lid member is provided in this groove portion. It is characterized in that it is inserted, the lid body is received by the step portion of the groove portion, the groove portion and the lid body are joined, and the groove portion is closed by the lid body to form the temperature control channel.

[0012]

According to the method of forming the temperature control channel of the mold of the invention according to the first aspect, the temperature control channel can be easily formed near the surface of the mold body. Therefore, the temperature control effect (cooling effect) is improved, the resin molding time can be shortened, and the cost can be reduced. Also, NC processing data can be used to process the surface of the mold body and integrate the lid with the surface of the mold body, which simplifies the processing.
When the cooling water flowing through the temperature control channel leaks, the cooling water bleeds, so that the location can be identified and repairing is easy.

Further, in the mold temperature control flow channel structure of the invention according to claim 2, in forming the temperature control flow channel, a groove is formed on the surface of the mold main body. The depth dimension can be arbitrarily selected, and a temperature control channel having a constant dimension can be easily formed from the surface. Similarly, the temperature control flow path can be formed in a three-dimensional curve along the free-form surface of the mold body, which facilitates temperature control of the mold body.

As described above, since the temperature control of the mold body is facilitated and the temperature control can be performed at a constant level, the shrinkage of the resin product can be made uniform. As a result, a high quality resin product can be obtained. Further, since the temperature control flow path is formed near the surface of the mold body, the temperature control effect (cooling effect) is improved, the resin molding time can be shortened, and the cost can be reduced.

Further, since the cross-sectional area of the temperature control passage can be freely selected depending on the site of the mold body, desired temperature control (cooling) can be performed for each site. Further, since it is easy to form the bypass groove portion which is continuous with the groove portion on the surface of the mold body, it is possible to easily cope with the design change.

In the mold temperature control flow channel structure of the invention according to claim 3, since the lid is received by the step portion of the groove, rigidity is maintained and the thickness of the lid is increased. Since the thickness can be reduced, the temperature control effect can be improved.

[0017]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a plan view of a mold provided with a temperature control channel structure according to the present invention, FIG. 2 is a sectional view taken along the line XX-X in FIG. 3, FIG. 3 is an enlarged detailed view of a Y portion in FIG. 2, and FIG. It is a top view of the metal mold | die provided with the temperature control flow path structure which concerns on another Example.

The mold body 1 of the mold is a cast product, and a plurality of temperature control channels 2 are formed near the surface 1a of the mold body 1. As shown in FIGS. 2 and 3, the temperature control channel 2 is formed by forming a stepped groove portion 3 on the surface 1a of the mold body 1 in a linear shape as shown in FIG. 1, for example. 3, the lid body 4 is inserted, the lid body 4 is received by the step portion 3a of the groove portion 3, the groove portion 3b of the groove portion 3 and the peripheral portion of the lid body 4 are joined by welding, and then the Thus, the surface 1a of the mold body 1 is processed to integrate the lid 4 with the surface 1a of the mold body 1.

As described above, in forming the temperature control flow path 2, since the groove portion 3 is formed on the surface 1a of the mold body 1, the depth dimension of the groove portion 3 can be arbitrarily selected. Therefore, it is possible to easily form the temperature control channel 2 having a constant size from the surface 1a.

Similarly, in forming the temperature control flow path 2, in order to form the groove 3 on the surface 1a of the mold body 1, as shown in FIG. 4, along the free curved surface of the surface 1a of the mold body 1. Thus, the temperature control flow path 2 can be formed by a three-dimensional curve. Therefore, the temperature control of the mold body 1 becomes easy. Further, since it is possible to easily form the bypass groove portion connected to the groove portion 3 on the surface 1a of the mold body 1, it is possible to easily cope with the design change.

Further, since the lid body 4 is received by the step portion 3a of the groove portion 3, the rigidity is maintained and the thickness of the lid body 4 can be reduced, so that the temperature control effect can be enhanced, and In order to process the surface 1a of the mold main body 1 to integrate the lid 4 with the surface 1a of the mold main body 1, NC processing data can be used, which simplifies the processing. When water leaks from the flowing cooling water, the cooling water bleeds, making it easy to find the part and repair it.

As described above, the temperature control of the die body 1 is facilitated and the temperature control can be performed at a constant level, so that the shrinkage of the resin product can be made uniform. As a result, a high quality resin product can be obtained.

Further, since the temperature control flow path 2 is formed near the surface 1a of the mold body 1, the temperature control effect (cooling effect) is improved, the resin molding time can be shortened, and the cost can be reduced. Can be lowered.

In addition, the cross-sectional area of the temperature control channel 2 is determined by the mold body 1
Since it can be freely selected depending on the part, it is possible to perform desired temperature adjustment (cooling) for each part.

The joining of the lid 4 to the mold body 1 is not limited to welding but an adhesive may be used.

[0026]

As described above, according to the method of forming the temperature control channel of the mold of the present invention, the groove is formed on the surface of the mold body,
The groove is closed with a lid to form a temperature control channel, and then the surface of the mold body is machined to integrate the lid with the surface of the mold body. Therefore, it is possible to easily form the temperature control channel near the surface of the mold body. Therefore, the temperature control effect (cooling effect) is improved,
The resin molding time can be shortened and the cost can be reduced. Further, since the surface of the die main body is processed to integrate the lid with the surface of the die main body, NC processing data can be used, which simplifies the processing, and the cooling water flowing through the temperature control channel can be used. When a leak occurs, the cooling water bleeds, so the location of the leak can be identified and repaired easily.

Further, in the temperature control flow channel structure of the mold of the present invention, since the groove portion is formed on the surface of the mold main body and the groove portion is closed by the lid, the temperature control flow channel is formed. In forming the passage, since the groove portion is formed on the surface of the mold body, the depth dimension of the groove portion can be arbitrarily selected, and the temperature control passage having a constant dimension can be easily formed from the surface. Similarly, the temperature control flow path can be formed in a three-dimensional curve along the free-form surface of the mold body, which facilitates temperature control of the mold body.

As described above, since the temperature control of the mold body is facilitated and the temperature control can be performed at a constant level, the shrinkage of the resin product can be made uniform. As a result, a high quality resin product can be obtained.

Further, since the temperature control passage is formed near the surface of the mold body, the temperature control effect (cooling effect) is improved,
The resin molding time can be shortened and the cost can be reduced.

Further, since the cross-sectional area of the temperature control channel can be freely selected depending on the site of the mold body, desired temperature control (cooling) can be performed for each site.

Further, since it is easy to form the bypass groove portion connected to the groove portion on the surface of the mold body, it is possible to easily cope with the design change.

Further, in the mold temperature control flow channel structure of the present invention, a stepped groove is formed on the surface of the mold body, and a lid is inserted into the groove, and the lid is inserted into the step of the groove. Since the groove is joined to the lid and the groove is closed by the lid to form the temperature control channel, the lid is received by the step of the groove, so that the rigidity can be maintained. Since the lid can be made thinner, the temperature control effect can be improved.

[Brief description of drawings]

FIG. 1 is a plan view of a mold having a temperature control channel structure according to the present invention.

FIG. 2 is a sectional view taken along line XX of FIG.

FIG. 3 is an enlarged detailed view of part Y in FIG. 2;

FIG. 4 is a plan view of a mold having a temperature control flow channel structure according to another embodiment of the present invention.

FIG. 5 is a cross-sectional view of a mold having a conventional temperature control flow channel structure.

FIG. 6 is a cross-sectional view of a mold provided with another conventional temperature control channel structure.

FIG. 7 is a cross-sectional view of a conventional temperature control flow channel structure.

FIG. 8 is a cross-sectional view of another conventional temperature control channel structure.

[Explanation of symbols]

 1 Mold Main Body 1a Surface 2 Temperature Control Channel 3 Groove 4 Lid

 ─────────────────────────────────────────────────── ─── Continued Front Page (72) Inventor Shigeru Shirai 19-1 Yamami Kogyo Co., Ltd., Fuji City, Shizuoka Prefecture (72) Inventor Takeshi Fukasawa 19-1 Yamami Kogyo Co., Ltd., Fuji City, Shizuoka Prefecture

Claims (3)

[Claims] 1. A groove is formed on the surface of a mold body, the groove is closed by a lid to form a temperature control channel, and then the surface of the mold body is machined. And a lid body integrated with the surface of the mold body to form a temperature control channel of the mold. 2. A temperature control flow channel structure for a mold, wherein a groove is formed on a surface of a mold body, and the groove is closed by a lid to form a temperature control flow channel. 3. A stepped groove is formed on the surface of the die body, a lid is inserted into the groove, the lid is received by the step of the groove, and the groove and the lid are joined together to form a groove. A temperature control flow channel structure of a mold, characterized in that a groove is closed by a lid to form a temperature control flow channel.